Hi , I am basically trying to crash the oracle database which has been created using raw logical volumes . When I use 'dd' command to crash the oracle database I find that the database is actually not crashing . I used the following steps to create Oracle database on raw logical volumes . 1. Created Physical Volumes's using pvcreate command # pvcreate /dev/sdp pvcreate -- physical volume "/dev/sdp" successfully created # pvcreate /dev/sdq pvcreate -- physical volume "/dev/sdq" successfully created 2. Created Volume Groups's # vgcreate vg06 /dev/sdp vgcreate -- INFO: using default physical extent size 4.00 MB vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte vgcreate -- doing automatic backup of volume group "vg06" vgcreate -- volume group "vg06" successfully created and activated # vgcreate vg07 /dev/sdq vgcreate -- INFO: using default physical extent size 4.00 MB vgcreate -- INFO: maximum logical volume size is 255.99 Gigabyte vgcreate -- doing automatic backup of volume group "vg07" vgcreate -- volume group "vg07" successfully created and activated 3. Created Logical Volume's # lvcreate -l 25 -n control01.ctl /dev/vg06 lvcreate -- doing automatic backup of "vg06" lvcreate -- logical volume "/dev/vg06/control01.ctl" successfully created # lvcreate -l 25 -n control02.ctl /dev/vg06 lvcreate -- doing automatic backup of "vg06" lvcreate -- logical volume "/dev/vg06/control02.ctl" successfully created # lvcreate -l 100 -n system01.dbf /dev/vg06 lvcreate -- doing automatic backup of "vg06" lvcreate -- logical volume "/dev/vg06/system01.dbf" successfully created # lvcreate -l 100 -n log01.log /dev/vg07 lvcreate -- doing automatic backup of "vg07" lvcreate -- logical volume "/dev/vg07/log01.log" successfully created # lvcreate -l 100 -n log02.log /dev/vg07 lvcreate -- doing automatic backup of "vg07" lvcreate -- logical volume "/dev/vg07/log02.log" successfully created 4. Removed the existing raw devices [root@LNXSRVZ /dev]# rm /dev/raw/raw41 rm: remove `/dev/raw/raw41'? y [root@LNXSRVZ /dev]# rm /dev/raw/raw42 rm: remove `/dev/raw/raw42'? y [root@LNXSRVZ /dev]# rm /dev/raw/raw43 rm: remove `/dev/raw/raw43'? y [root@LNXSRVZ /dev]# rm /dev/raw/raw44 rm: remove `/dev/raw/raw44'? y [root@LNXSRVZ /dev]# rm /dev/raw/raw45 rm: remove `/dev/raw/raw45'? y 5.Recreate raw devices using 'mknod' command # mknod /dev/vg06/rsystem01.dbf c 162 41 # mknod /dev/vg06/rcontrol01.ctl c 162 42 # mknod /dev/vg06/rcontrol02.ctl c 162 43 # mknod /dev/vg07/rlog01.log c 162 44 # mknod /dev/vg07/rlog02.log c 162 45 6. Used 'raw' command to bind raw device to block device # raw /dev/vg06/rsystem01.dbf /dev/vg06/system01.dbf /dev/raw/raw41: bound to major 58, minor 19 # raw /dev/vg06/rcontrol01.ctl /dev/vg06/control01.ctl /dev/raw/raw42: bound to major 58, minor 17 # raw /dev/vg06/rcontrol02.ctl /dev/vg06/control02.ctl /dev/raw/raw43: bound to major 58, minor 18 # raw /dev/vg07/rlog01.log /dev/vg07/log01.log /dev/raw/raw44: bound to major 58, minor 20 # raw /dev/vg07/rlog02.log /dev/vg07/log02.log /dev/raw/raw45: bound to major 58, minor 21 7. CHANGED THE FILE PERMISSIONS # chmod 766 /dev/vg06 # chmod 766 /dev/vg06/* # chmod 766 -R /dev/vg07 # chmod 766 -R /dev/vg07/* # chown oracle:oinstall -R /dev/vg07 # ll /dev/vg06/* brwxrw-rw- 1 oracle oinstall 58, 17 Apr 29 14:06 /dev/vg06/control01.ctl brwxrw-rw- 1 oracle oinstall 58, 18 Apr 29 14:06 /dev/vg06/control02.ctl crwxrw-rw- 1 oracle oinstall 109, 6 Apr 29 14:05 /dev/vg06/group crwxrw-rw- 1 oracle oinstall 162, 42 Apr 29 14:10 /dev/vg06/rcontrol01.ctl crwxrw-rw- 1 oracle oinstall 162, 43 Apr 29 14:10 /dev/vg06/rcontrol02.ctl crwxrw-rw- 1 oracle oinstall 162, 41 Apr 29 14:10 /dev/vg06/rsystem01.dbf brwxrw-rw- 1 oracle oinstall 58, 19 Apr 29 14:06 /dev/vg06/system01.dbf # ll /dev/vg07/* crwxrw-rw- 1 oracle oinstall 109, 7 Apr 29 14:05 /dev/vg07/group brwxrw-rw- 1 oracle oinstall 58, 20 Apr 29 14:06 /dev/vg07/log01.log brwxrw-rw- 1 oracle oinstall 58, 21 Apr 29 14:07 /dev/vg07/log02.log crwxrw-rw- 1 oracle oinstall 162, 44 Apr 29 14:10 /dev/vg07/rlog01.log crwxrw-rw- 1 oracle oinstall 162, 45 Apr 29 14:10 /dev/vg07/rlog02.log 9. init$ORACLE_SID.ora file had the following contents db_name = rawlvm1 db_files = 400 db_file_multiblock_read_count = 16 db_block_buffers = 550 shared_pool_size = 5000000 log_checkpoint_interval = 10000 processes = 100 parallel_max_servers = 8 log_buffer = 32768 global_names = TRUE control_files = (/dev/raw/raw42, /dev/raw/raw43) db_block_checksum = true db_block_size = 4096 background_dump_dest = /u00/app/oracle/admin/hard/rawlvm/bdump core_dump_dest = /u00/app/oracle/admin/hard/rawlvm/cdump user_dump_dest = /u00/app/oracle/admin/hard/rawlvm/udump 10. Created oracle database SQL> startup nomount; ORACLE instance started. Total System Global Area 53178448 bytes Fixed Size 450640 bytes Variable Size 50331648 bytes Database Buffers 2252800 bytes Redo Buffers 143360 bytes SQL> SQL> create database "rawlvm1" 2 controlfile reuse 3 maxinstances 8 4 maxlogfiles 32 5 datafile 6 '/dev/raw/raw41' size 40M reuse 7 logfile 8 '/dev/raw/raw44' size 20M , 9 '/dev/raw/raw45' size 20M ; Database created. Please let me know if there is something fundamentally wrong in the above steps used for creating Oracle database . After creating the database I used the following 'dd' command to crash the database dd if=/boot/vmlinux-2.4.2-2 of=/dev/sdp Strangely this command does'nt seem to crash the database . Can anybody help me out to crash the Oracle database ? _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
